单选题Nexus# conf t Enter configuration commands， one per line. End with CNTL/Z. Nexus（config）# interface Loopback10 % Permission denied Nexus（config）# ？ no Negate a command or set its defaults username Configure user information. end Go to exec mode exit Exit from command interpreter What is the reason why this user is not able to enter configuration commands？（）A The user did not enter enable prior to going into configuration mode.B The software license installed on Nexus is Layer 2 only， which does not allow the creation of Layer 3 interfaces.C The user RBAC role is set to network-operator.D The user failed authentication and user access defaulted to read-only mode.E The AAA server is currently not responding.
单选题
Nexus# conf t Enter configuration commands， one per line. End with CNTL/Z. Nexus（config）# interface Loopback10 % Permission denied Nexus（config）# ？ no Negate a command or set its defaults username Configure user information. end Go to exec mode exit Exit from command interpreter What is the reason why this user is not able to enter configuration commands？（）
A
The user did not enter enable prior to going into configuration mode.
B
The software license installed on Nexus is Layer 2 only， which does not allow the creation of Layer 3 interfaces.
C
The user RBAC role is set to network-operator.
D
The user failed authentication and user access defaulted to read-only mode.
E
The AAA server is currently not responding.
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